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st: RE: extract a subset of numbers from a bigger number


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: extract a subset of numbers from a bigger number
Date   Wed, 15 Sep 2004 18:36:09 +0100

Similar questions are often asked on this list. 

If X is numeric, 

gen newvar = mod(X,100000) 

If it is string, 

gen newvar = substr(X,-5,5) 

For this kind of basic operation, rummaging in the 
help for functions is illuminating. 

Nick 
n.j.cox@durham.ac.uk 

Alejandro Riaņo
 
> How can I extract the last 5 digits a 9-digit number
> (say a social security number) creating a new variable
> ?
> 
> i.e.
> 
> X                  newvar
> 999912345 --->     12345

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